I Was Tricked Into Being A Full Time Step Mom

Am I Wrong For Not Wanting My Fiancés Kids To Live With Us Even Though I Brought Kids From A Previous Relationship? It’s So Much Babymama Drama The Children Are I’ll Mannered and He’s Never Really Here Anyway So I’m Stuck “Babysitting” Even One That Isn’t Biologically His. Before I Moved Here I Was Not Told That They Lived With Him Full Time. I’ve Never Been A Step Mom And Honestly I Dont Like It. I’m Fine With Weekends But I’m Having A Hard Time. Sometimes It Becomes Too Much To Handle And I Wanna Break Down I Mean We’re Talking 11 Kids That Includes A Newborn And 3 Toddlers…It’s Hard Talking To Him About It Bc He Gets So Defensive….Any Advice???